Roller ski



FIG. 1 is a top, side perspective view of a roller ski showing our new design, the opposite side being a mirror image thereof;

FIG. 2 is a top, side perspective view thereof illustrating the side shown in FIG. 1;

FIG. 3 is a bottom, side perspective view thereof illustrating the side shown in FIG. 1, the opposite side being a mirror image thereof;

FIG. 4 is a bottom, side perspective view thereof illustrating the side shown in FIG. 3;

FIG. 5 is a bottom, side perspective view thereof taken from a slightly different elevation than FIG. 3;

FIG. 6 is a bottom perspective view thereof illustrating the side shown in FIG. 3; and,

FIG. 7 is a bottom, side perspective view thereof illustrating the side shown in FIG. 3. 

The ornamental design for a roller ski, as shown and described. 